I was in the middle of the Amazon with my wife, a medical researcher there. We did not speak the local language, did not know the customs, and even did not entirely _________ the food. We could not have felt more _________.

Then one perfect Amazonian evening, with monkeys calling from beyond the village green, we played soccer. _________ darkness came over the field and the match ended, the goal keeper, Juan walked over to me and said in a matter-of-fact way, “In your home, do you have a moon too? ” I was surprised. After I _________ to Juan that yes I felt a sort of awe at the _________ that existed in his world. where the unknown and undiscovered was _________ and amazing. Anything was possible.

In our society, we know that Earth has only one moon. I can, from my computer at home, _________ satellite images of Juan’s village. There are no more moons to search for, little _________ to discover. Yet, as an ant biologist, I knew that much in the world of insects remains unknown. How much, though? How _________ are we? The question of what we know and do not know __________ bother me.

I began to __________ newspaper articles about new species, and on and on they __________. In looking into the __________ of biological discovery, I also began to find a collection of scientists, who very often focused on common phenomena more to the point of exhaustion (筋疲力尽), and even at the risk of the __________ of their peers.

We used to think that nothing lived deeper than six hundred meters. Yet, when something new __________ more often than not, we do not even know its name.

A teacher teaching Maths to seven-year-old Laiq asked him, “If I give you one apple and one apple and one apple, how many apples will you have?”

Within a few seconds, Laiq _______ confidently, “Four!”

The confused teacher was expecting a(n) _______ correct answer, three. She was disappointed. “Maybe the child did not listen _______” she thought. She _______ , “Laiq, listen carefully. If I give you one apple and one apple and one apple, how many apples will you have?”

Laiq had seen the _______ on his teacher’s face. He _______ again on his fingers. But within him he was also _______ the answer that would make the teacher happy. This time hesitatingly he replied, “Four.”

The disappointment stayed on the teacher’s face. Suddenly she _______ that Laiq like strawberries. She thought maybe he didn’t like apples and that was why he couldn’t answer the question. This time with an excitement in her _______ she asked, “If I give you one strawberry and one strawberry and one strawberry, then how many you will have?”

Seeing the teacher ________ , young Laiq calculate on his fingers again. There was no pressure on him, but a little on the teacher. She wanted her new ________ to succeed. ________ a hesitating smile young Laiq replied, “Three?”

The teacher now had a ________ smile. Her approach had succeeded. She wanted to ________ herself. But one last thing remained. ________ she asked him, “Now if I give you one apple and one apple and one more apple how many will you have?”

Confidently Laiq answered, “Four!” The teacher was ________ . “How Laiq, How?” she demanded in a little annoyed voice.

In a voice that was ________ and hesitating young Laiq replied, “Because I already have one ________ in my bag.”

The story tells us: ________ someone gives you an answer that is ________ from what you expect, don’t think they are wrong. There shall be an angle that you may not have thought about yet.

“What's all this tree-planting for? " I was asked when I began writing about restoring(修复) a piece of land I had _________ in Somerset. The truth is, I just love trees. And I am not _________ “As I get older, all I really _________ is to plant trees ,” Prince Charles says in a BBC programme in which he is _________ in the wood he planted on the day Prince George was born.

We have inherited _________ and wonderful trees in our cities and villages. They were planted, or self-sown, years, even centuries ago. We take them for granted, _________ the creatures living among them, remain in ignorance of the _________ trees are doing us (cleaning the air, for example) and cut them down for _________. Yet we keep a feeling of _________ for them. This may account for the __________ the government faced in 2010 when it sought to sell off publicly owned woods, and for the wide support the Woodland Trust (a tree-protecting charity) __________.

Trees need __________, which is why I, a city-resident, bought my Somerset woodland in 1999. At that time, climate change was already well proved, __________ my hopes of planting long-lived oaks and pines gradually ________ anxiety about their chances. Tree diseases new to the UK, wind, drought and flood were all putting them at __________.

But I did not __________ things to move so fast. The woodland is good, and the new trees are growing like mad, but the creatures are __________. The rabbits have disappeared(due to some disease, perhaps?) and the owl has moved. The bees and butterflies are still there but in smaller ________. If this can happen in my wood that is __________ pesticides (杀虫剂)and herbicides (除草剂) , it surely indicates we need to give nature the chance to restore its own ________. Meanwhile, I love my wood, and tree-planting has also done wonders for restoring my balance between town and country.